RAM 9000 Series Hardware Guide 2-44Hardware Installation Revised 2015-07-16CleaningHere are some recommendations to reduce the ambient temperature around the unit for optimal performanceand to prevent temperature related issues:• Make sure other hot devices are not mounted immediately adjacent or below the unit.• Use a DIN rail spacer between adjacent units so heat cannot transfer due to direct contact.• Use a cabinet fan or other enclosure cooling technique.• Minimize the rate or frequency of your wireless communications. Simply polling or reporting too frequentlycan cause the temperature of the unit to increase significantly.Note: Some models allow you to monitor the internal temperature of the cellular modem inside. For best perfor-mance, this internal temperature should be kept below 85°C. Refer to the Software Manual for details.Cold Operating Conditions:These units will operate down to -40°C when properly installed in an enclosure that protects them from directexposure to the elements. These units are not rated for outdoor installation without protection. Please note thatwhen operating below -30°C some reduction in the wireless performance may occur.CleaningClean only with a damp cloth. Excess moisture or harsh chemicals can cause damage to the unit.